Step x Step!!

Teppei, a 16-year-old, had previously attempted to run away with his first love, who was a young boy at the time. When they reunite, the former has become a perverted and harassing figure. To complicate matters, their parents have remarried, making them stepbrothers who now live together under the same roof. The story explores the impact of this situation on Teppei's love and sense of innocence.